Question
Which of the following statements is / are correct?
1. Viruses lack enzymes necessary for the generation of energy.
2. Viruses can be cultured in any synthetic medium.
3. Viruses are transmitted from one organism to another by biological vectors only.
Select the correct answer using the codes given below.
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Answer:
A
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Explanation:
Viruses lack enzymes necessary for the generation of energy: This statement is correct. Viruses are obligate intracellular parasites that lack their own cellular machinery, including enzymes for energy generation. They rely on host cells to provide the necessary enzymes and resources for replication.
Viruses can be cultured in any synthetic medium: This statement is incorrect. Viruses cannot be cultured in any synthetic medium alone. They require living host cells to replicate and propagate. Synthetic mediums alone cannot provide the necessary cellular environment for viral replication.
Viruses are transmitted from one organism to another by biological vectors only: This statement is incorrect. While some viruses are indeed transmitted through biological vectors such as mosquitoes or ticks, not all viral transmission is solely dependent on biological vectors. Viruses can also spread through direct contact, respiratory droplets, contaminated surfaces, and other modes of transmission.